Construction of fireplaces to prevent their smoking



H. ROBERTS Chimney. No. 1.578. Patented April 3-0, 1840.

HOMER ROBERTS, OF DELHI NEW YORK.

CONSTRUCTION OF FIREPLACES TO PREVENT THEIR SMOKING.

Specification of Letters Patent No. 1,578, dated April 30, 1840.

To all whom'it may concern:

Be it known that I, HOMER ROBERTS, of Delhi, in the county of Delawareand State of New York, have invented a new and useful Improvement in theConstruction of Chimneys to Prevent Them from Smoking, which isdescribed as follows, reference being had to the annexed drawings of thesame, making part of this specification.

Figure l represent-s a front view of the fire place; Fig. 2, verticalcross sections; Fig. 3, one of the end plates; Fig. 4:, curved plateforming the bottom of upper flue and straight plate forming back offranklin; Fig. 5, hinged plates; Fig. 6, one of the upper sheet ironplates; Fig. 7 the other sheet iron plate; Fig. 8, the curved or twistedsheet iron flue; Fig. 9, the air boX in the hearth.

Similar letters refer to similar parts in the figures.

The nature of this invention consists in a certain new and usefularrangement of curved and straight cast and wrought iron plates in andabove the throat of the chimney by which the wind is prevented fromblowing through the throat into the fire place and driving the smoke andfire into the rooms and by which the draft is increased by the airbecoming heated from said plate and also said arrangement furnishingfacilities for cleaning out the soot and likewise preventing an entranceof persons to the interior of the house through the chimney and fireplace.

The fire place and chimney are made in the usual mode.

I take two cast iron plates A, each made similar to that represented inFig. 3 and place them in a vertical position upon oftsets in the backwork of the j-ambs. Then I place between said plates two combinedinclined and curved plates B C D E, like those represented inperspective Figs. 4 and 5. Fig. 4 is in one piece and turns on pivots Frunning through the end plates, so as to raise the lower part to open apassage for the discharge of soot, at the same time depressing thecurved part. That which is represented in Fig. 5 is made in two parts D,E. The straight part E forms part of the franklin back. The curved partD forms the bottom part of the top flue G, Fig. 2, which entersimmediately underthe mantel piece at H. The straight part E or thatwhich forms the back of the franklin extends nearly to the angle of themovable part, leaving a space I for the lower flue. The straightstationary plate E or upper part of the franklin back is secured bytenons running through the side plates A and are keyed on the outside.The curved part D rests with its lower edge upon the top of the franklinback and upon small knobs or projections cast on the inside of the endplates A. The top of the upper flue is formed by two segment wrought orcast iron plates K, L, such as those represented in Figs. 6 and 7, andrest on the upper edges of the end plates A fastened by tenons on saidend plates running up through mortises in the top plates and keysinserted through the tenons above them. The two top plates K L do notcome to gether, but are sufiiciently far apart to form a flue M, Fig. 2,for allowing the air which blows down the chimney to pass into the.

curved rim flue. The lower edge of the lower plate turns up and restsagainst the back of the mantel piece having an opening for the dischargeof soot. Where these curved plates approach each other and arecontracted to a narrow throat they enter a hollow curved or twisted flueN, Fig. 8, with a small aperture 8 in the end, which turns over andprevents the wind from blowing down the chimney by the curved plate,which turns over and covers it, and through said opening the smoke isdischarged into the chimney. This curved flue is riveted to the top edgeof the top curved sheet iron plate. It is represented in Fig. 8 inperspective. The lower part of the outside plate of the curved fluecurves under the upper edge of the swinging plate and forms an entrance0 for air which blows down the chimney. There is a cast iron box P, Fig.9, placed in the hearth to admit cold air from the outside to the fireplace to promote a quick draft. The cold air in the chimney is rarefiedby the heated plates and ascends and the counter currents of cold airblowing down the chimney strike against the curved plates, are turnedupward and pass through the openings M and '0 into the curved flue.

What I claim as my invention and desire to secure by Letters Patentconsists in.

The before described mode of arranging 5 the cast and Wrought ironstraight and curved plates in the chimney forming curved fines forcurving and preventing chimneys from smoking and formingvopenings forthe convenience of removing the soot and for 10 obtaining an easyadmissioninto the chimney from the fire placefas herein set pforth HOMERROBERTS.

Witnesses EDMUND MAKER, WM. "S. Ennior.

